Which managers won't survive season?

It's possible that there will be no other midseason firings, as an overall period of stability should follow the rash of changes in 2010. But how much loyalty will Marlins owner Jeffrey Loria show Edwin Rodriguez, who was given only a one-year contract?

Rodriguez is in a terrible spot with a team that has collapsed (losing 15 of last 16) and construction almost complete on a new stadium. He's a huge long shot to stay on the job into 2012 but could make it to the end of this season. Other guys who could go before their time is up are the White Sox's Ozzie Guillen, the Dodgers' Don Mattingly, the Rockies' Jim Tracy and the Astros' Brad Mills.

The Cubs and Astros are both looking way up at the Pirates right now, which is not exactly the kind of thing that promotes managerial job security.

There is an online wagering site that has posted a "Who's the next MLB manager to go?" proposition bet, and Cubs manager Mike Quade is the current favorite, but Astros skipper Brad Mills has to be looking over his shoulder too.

The Astros have the worst record in baseball and are in the midst of an ownership change. Throw in some dugout turmoil that led to the recent firing of popular pitching coach Brad Arnsberg and it's fair to speculate that incoming owner Jim Crane may be looking to shake things up after the sale.

The two most tenuous managerial situations might be in Florida and Houston.

Edwin Rodriguez, who replaced Fredi Gonzalez as interim manager last June, led the Marlins to a 29-19 start. Due in part to injuries and non-performance, they lost 17 of their next 20. The Marlins have retained Rodriguez through the 2011 season, but the prevailing thought is they will look for a higher-profile guy heading into the new ballpark in 2012.

In Houston, second-year man Brad Mills is 101-130 during his season and a half, including a 25-44 mark in 2011. Pitching coach Brad Arnsberg has lost his job. The new ownership could be looking to make a splash by installing its manager of choice.

Marlins owner Jeffrey Loria believes his team should win but seldom pays the price for players. Loria instead pays a well-regarded baseball management team. So at whom does Loria point the finger when the Marlins don't win? Sorry, Edwin Rodriguez.

Three other National League managers appear in danger because of ownership issues. In Chicago, the Cubs' high-priced ineptitude could cost manager Mike Quade his job. In Houston, incoming owner Jim Crane could dump the management that assembled the team with the worst record in the league. In L.A., where the Dodgers play to a half-empty stadium, the team could be up for sale soon, and a new owner might clean house.